dittmeyer



y Feb. 2s, 192s.

1,660,436 P. DITTMEYER APPARATUS FOR PURIFYING WITH THE AID OF ANENDLESS SIEVE 0R RAKE BAND WATER WHICH HAS BEEN POLLUTED BY FLOATING ORSINKING SUBSTANCES Feb. 28, 1928. 1,660,436

, P. DITTMEYER APPARATUS Fon PURIFYING WITH THB AID oF AN ENDLEssSI1-IVE on BAKE BAND WATER WHICH HAS BEEN POLLUTED BY FLOAIING onsINxING susTAucEs Filed June s, 192s 2 sheets-Sheet 2 `Patented Feb. 28,1928.

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rannnrrfrianvnn, Dacnrrsnn, BY AUGUSTE; DmrMnYnR, Nasrrnrrnagrrnrn Ann nninrrvrs'rian-frrtrx,jon.Lunar/'1Gsenno,.stnnialnivv.A

VvernamUs non, rURrFYING wrrn Tnnarn 'or'nrvinnnnnss snvn canaria BannWATER WHICH'HAS'BEEN roLLrJrnD BY'FLoi-vrrive on srnKnvG sUnsTANCEs.

application med time s, i926, semi no;

` cial material and further by the serpentine guiding of the sieve band.

An embodiment ot the invention is shown, by way of'eXample, in theaccompanying drawing, in which Fig. 1 isa longitudinal sect-ion throughthe apparatus. j

Fig. 3 illustrates the guiding of the sieveband and the material of thesame.

Fig. 4 illustrates in side elevation'and on larger scale the packingbetween the clear water-chamber and the chamber containing the pollutedwater inside the guiding for the sieve band.

Fig. 5 shows in side elevation a portion of the packing bars.

The polluted water is supplied to the apparatus through a channel 1adapted to be shut off' by a sluice and the water flows into thesettling tank 2 in which the endless sieve 3 is arranged which is guidedover pulleys 4. The polluted water can be admitted into the spaceVenclosed by the sieve band or into the space which surrounds the sieveband. The purified water fiows into a tank 5 and thence into the clearwater channel 6. It depends on local conditions whether the pollutedwater is made to flow through the sieve `band from the outer side to theinner side or inversely.

The pulleys 4 connected with one another at both ends by articulatedchains move in lateral guidings 7 arranged in the clearing tank andguide the sieve over sprocket wheels 8, mounted on the top end of theclearing tank.

The axle 16 of the sprocket wheel 8 serves to drive the sieve, it beingitself intermittently revolved by an electromotor 19. `If the Sieve isclogged after having served some 114,568, aaa in Germany vomver ze,1921i.A

float 11 ascends vand switches off the starter 12 as soon as the floatarrives at the highest position whereby the sieve is stopped. Thestarter 12 may be otany convenient type and of any known structure. n

A friction-coupling 15 is preferably insei-ted into the driving gearbetween'the motor and the driving drum 8 which 'coupling f yields iflarge foreign lbodies-should stop the sieve.

lThe sieve band 3 is made ot strand wire which, owingto its roughsurface, effects a better purifying of the water than smooth wire. Inorder to ensure a better utilization ot the sieve band this band isguided over guide pulleys 17 so Ythat loops are formed. 'It is.advisable to provide notA more than three loops. The efficiency ot thesieve is considerably improved by' the serpentine shape and its effectis increased. The cleaning of the sieve Yband is also improved there byas a shower bath can be arranged at three points e. g. above the 4threebends.

The guidings for the conveying pulleys 4 are made rof U-irons v18 havingeach an offset portion 19 directed towards the surface of the sieveband. Bars` 20 fixed-on the vaXles of the pulleysvengage with theiroffset portions 19. For theoffset portion 19 of the U-irons an angleiron might be substituted on the upper edge of the U-iron, the

bar 2O engaging betweenthek arm of the angle iron and the arm of theUsiron. The bars 2O ensure that the polluted water can flow'into theclear water chamber only in passing through the sieve band so that alldirtv particles are caught in the sieve band.

1v claim f-. n

1. An .apparatus for purifying water which is polluted byfioating orsinking substances comprising in combination with a clearing tank andwith a clear water tank, an endless sieve band in said clearing tankbetween the point at which the polluted wa- The remainder of thepollutedy water flows off through atrough 14. Fig. 2 is a section online II-II of Fig. 1. v

ter lows in and the point at which the purified water flows oli" so thatthe polluted Water is forced to traverse said sieve band, conveyerpulleys for conveying said sieve band, guidings at either side of thissieve band in which said conveying pulleys are guided said i guidingsconsisting ofU-irons, an angular in said Clearing tank between the pointat `which the polluted water llowsin and the point at which the purifiedwater flows off so that the polluted Water is forced to trav-` erse saidsieve band,V conveyer pulleys for side of this sieve band in which saidconveying pulleys are guided said guidngs consisting of Ufirons, anangular extension of each guiding directed towards said sieve band, andharsiXed on the ends ofthe axles vof every two conveying pulleys andguided in said `angular extension.

In testimony whereof I signature.

AUGUSTDlTTMEYER, ne PFEFFER, Heir andadmimstmtri 'of Paul Dit/integer,de-

ceased.

` conveying said sieve band, guidings at either

